以聚乙烯吡咯烷酮(PVP)为表面活性剂,采用水热法制备了GdF3∶Eu3+纳米晶.利用X射线衍射(XRD)、扫描电镜(SEM)、红外光谱(IR)和荧光光谱对样品进行了表征.XRD研究结果表明:制备的样品为正交结构的GdF3纳米晶.PVP的使用有利于减小晶粒尺寸和提高颗粒的均匀性.发射光谱研究结果表明:位于594 nm处的主发射峰来自于Eu3+的5 D0→7F1磁偶极跃迁.5D0→7F1与5 D0→7 F2跃迁发射强度比值表明:以PVP为表面活性剂制备的样品中Eu3+的局域对称性相对下降.激发光谱研究结果表明:Gd3+与Eu3+之间有较好的能量传递.纳米晶表面的PVP可能与稀土离子之间形成配位键.
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